Fix This Broken Encrypted Linux Block Device

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Fix This Broken Encrypted Linux Block Device

In this activity you will resolve an issue that prevents a LUKS container from being opened successfully. You are working as a System Administrator and tasked with opening and mounting a corrupted LUKS container. Currently the device is not recognized as a LUKS container as shown by the isLuks command: ``` # cryptsetup -v isLuks /dev/loop0 Command failed with code -1 (wrong or missing parameters). ``` You will need to login to the remote system running CentOS Linux 7.7 and resolve the issue.

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Lab Info

Level

Intermediate

Last updated

Apr 06, 2025

Duration

15m

Challenge

Repair the Corruption

sudo cryptsetup luksHeaderRestore --header-backup-file /root/header.backup /dev/loop0

Challenge

Confirm the LUKS Container Is Intact
```
sudo cryptsetup -v isLuks /dev/loop0
```

Challenge

Open the LUKS container Using the Keyfile in /root/lukskey

sudo cryptsetup luksOpen /dev/loop0 encvol --key-file /root/lukskey

Challenge

Mount the Filesystem and Confirm the Data Is Readable
Mount the filesystem:
```
sudo mount /dev/mapper/encvol /mnt
```
Read data:
```
cat /mnt/secret
```

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